My career has led to a number of long-distance relocations, meaning we have to connect with new neighbors, services and communities. NextDoor.com has been a great help to us, in communities from California to Michigan.
While a few curmudgeonly types may participate, the vast majority of people involved on NextDoor.com have (in our experience) been warm, helpful, community-minded and friendly.
I highly recommend NextDoor.com!